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分子蒸餾模擬分離菜籽油脫臭餾出物中維生素E
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    摘要:

    通過對分子蒸餾液膜表面流體流動和傳質(zhì)、傳熱分析，建立了二維分子蒸餾模型的傳質(zhì)和傳熱方程，并對菜籽油脫臭餾出物中維生素E的分離進行模擬。研究結(jié)果表明：隨著蒸餾溫度和進料溫度的增加，維生素E質(zhì)量分數(shù)增大；隨著進料速率增加，維生素E質(zhì)量分數(shù)降低。維生素E達到最高質(zhì)量分數(shù)時的模擬蒸餾溫度比試驗結(jié)果提高了20 K，質(zhì)量分數(shù)相差15%，為分子蒸餾分離脫臭餾出物中維生素E的操作參數(shù)優(yōu)化提供了理論依據(jù)。

    Abstract:

    Equilibrium equations of a binary mixture for molecular distillation were derived on the basis of heat and mass transfer in liquid films. Simulation on separation of tocopherol from rapeseed oil deodorizer distillate was carried out. Evaporator temperature of model was 20K higher than experimental value, and relative error of tocopherol concentration was below 15% when high tocopherol concentration was obtained. Results showed that tocopherol concentration increases with the enhancement of evaporator, while feed temperature decreases with feed rate. It provided theoretical basis for the separation of tocopherol from deodorizer distillate.

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邵平,姜紹通,潘麗軍,孫培龍.分子蒸餾模擬分離菜籽油脫臭餾出物中維生素E[J].農(nóng)業(yè)機械學(xué)報,2007,38(7):78-81.[J]. Transactions of the Chinese Society for Agricultural Machinery,2007,38(7):78-81.

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